Title:
METHOD AND DEVICE FOR GENERATING FLOWRATE PULSE AND/OR ELECTRONIC-TYPE GAS METER
Document Type and Number:
Japanese Patent JP3589397
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain flowrate pulse generation method and device and/or an electronic-type gas meter that can generate a flowrate pulse with a period according to the passing volume of gas without shortening a sampling period.
SOLUTION: Every time when a calculation means 14a-1 intermittently calculates passing volume at a fixed period, a calculation means 14a-2 calculates the 1/N value of the passing volume. Until an integrating means 14a-3 integrates the 1/N value for N times, a counter means 14a-4 repeatedly counts the number of times of integration where an integration value reaches unit passing volume/2 or more. Until the integration is made for N times, every time when the unit passing volume/2 is reached, a subtraction means 14a-5 repeatedly subtracts the value of the unit passing volume/2 from the integration value. A decision means 14a-6 multiplies the number of integration times by a fixed period, 1/N, for determining an output reversal timing to the next. A pulse generation means 14a-7 reverses output at the decision timing for generating the flowrate pulse of a period corresponding to the passing volume.
Inventors:
Shinichi Tanaka
Application Number:
JP19889199A
Publication Date:
November 17, 2004
Filing Date:
July 13, 1999
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
G01F1/00; G01F1/66; G01F15/075; (IPC1-7): G01F1/66; G01F1/00; G01F15/075
Domestic Patent References:
| JP4058114A |
Attorney, Agent or Firm:
Hideo Takino
Hiroshi Ochi
Sadao Matsumura
Isamu Kakiuchi
Hiroshi Ochi
Sadao Matsumura
Isamu Kakiuchi